Is CVE-2020-5291 actively exploited?

CVE-2020-5291 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2020-5291?

CVE-2020-5291 has a CVSS score of 7.2 (HIGH severity). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N.

How do I patch CVE-2020-5291?

Patch guidance is available from projectatomic security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2020-5291.

Fix CVE-2020-5291 - HIGH projectatomic bubblewrap

Q: Which products are affected by CVE-2020-5291?

4 products: projectatomic bubblewrap, debian debian linux, archlinux arch linux, centos centos.

Description

Bubblewrap (bwrap) before version 0.4.1, if installed in setuid mode and the kernel supports unprivileged user namespaces, then the `bwrap --userns2` option can be used to make the setuid process keep running as root while being traceable. This can in turn be used to gain root permissions. Note that this only affects the combination of bubblewrap in setuid mode (which is typically used when unprivileged user namespaces are not supported) and the support of unprivileged user namespaces. Known to be affected are: * Debian testing/unstable, if unprivileged user namespaces enabled (not default) * Debian buster-backports, if unprivileged user namespaces enabled (not default) * Arch if using `linux-hardened`, if unprivileged user namespaces enabled (not default) * Centos 7 flatpak COPR, if unprivileged user namespaces enabled (not default) This has been fixed in the 0.4.1 release, and all affected users should update.

CVSS Metrics

Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N
Attack Vector: local
Complexity: high
Privileges: low
User Action: required
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-648 CWE-269 · Improper Privilege Management

Metadata

Primary Vendor: PROJECTATOMIC
Published: 3/31/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

projectatomic : bubblewrapdebian : debian_linuxarchlinux : arch_linuxcentos : centos

Remediation Guidance

Executive Summary

View on NIST NVD